Regrind Cam?

Rough idle and 16" of vacuum? :-k What's the rest of your combo? intake, carb, timing advance at idle etc...

What RPM are you idling at? 16" is a little more vacuum than I would expect from that cam. And I agree with Mike, I wouldn't bother with a regrind. New cams aren't all that expensive, and you're going to have to spring for new lifters anyway. I'm just wondering if there isn't something else going on, 16" of vacuum isn't usually an indicator for a rough idle.

Looking at the cam-

XE 274:
advertised duration: 274 int./286 exh.
duration at 050" : 230 int./236 exh.
lift at 1.5:1 : 0.488 int./0.491 exh.
Basic Operating RPM Range : 1,800-6,000

By comparison, my Lunati Voodoo 60404 (old part #)

10200704 (new part #)

Advertised Duration: 276 int./284 exh.
Duration at 050": 234 int./242 exh.
Lift at 1.5:1: 0.513 int./0.533 exh
Basic Operating RPM Range: 2,200-6,400

Obviously the Lunati 60404 is a little more cam, the 60403 is closer to the equivalent of the XE274, so the 60404 is about one step up. But I'm idling at ~10" of vacuum. Idle is definitely choppy, but I wouldn't call it rough, at least not when it's warmed up. It's probably about the limit for what I would consider for a daily driver though, which is how I use my car. At least for a 4 speed car, an auto would make it a little easier to manage in traffic. ;-). But not as much fun.

1968 340, .060" over, KB 243 hyper pistons, Lunati 60404 cam, duration 276/ 284, Lift .513/ .533. Compression ~9.8:1. 308 heads ported and flowing 264cfm at .500", Doug's headers, Summit 2.5" dual exhaust with Dynomax welded Ultra-flo's. Eddy air gap intake, holley 750 DP, Timing set at 20* initial, 34* all in mechanical only.

Idle is about 750-800 in the video, the little rallye dash tach isn't all that accurate

[ame]https://youtu.be/62bjHlxzsoA[/ame]